﻿using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace fanfu.Common
{
    /// <summary>
    /// string类型的功能扩展类
    /// </summary>
    public sealed class StringPlus
    {
        #region 去除字符串最后一个指定字符

        /// <summary>
        /// 去除字符串最后一个','号
        /// </summary>
        /// <param name="source">待处理的字符串</param>
        /// <returns>返回已处理的字符串</returns>
        public static string CutComma(string source)
        {
            return CutComma(source, ",");
        }

        /// <summary>
        /// 去除字符串最后一个指定字符
        /// </summary>
        /// <param name="source">待处理的字符串</param>
        /// <param name="indexStr">需要去除的字符串</param>
        /// <returns>返回已处理的字符串</returns>
        public static string CutComma(string source, string indexStr)
        {
            if (source.IndexOf(indexStr) >= 0)
                return source.Remove(source.LastIndexOf(indexStr));
            else
                return source;
        }

        #endregion

        #region 截取字符串，超过部分用...替换

        /// <summary>
        /// 截取字符串，超过部分用...替换
        /// </summary>
        /// <param name="source"></param>
        /// <param name="length"></param>
        /// <returns></returns>
        public static string StringDot(string source, int length)
        {
            source = source.Trim();
            string resultStr = "";
            byte[] myByte = System.Text.Encoding.Default.GetBytes(source);
            if (myByte.Length > length)
            {
                for (int i = 0; i < source.Length; i++)
                {
                    byte[] tempByte = System.Text.Encoding.Default.GetBytes(resultStr);
                    if (tempByte.Length < length)
                    {
                        resultStr += source.Substring(i, 1);
                    }
                    else
                    {
                        break;
                    }
                }
                return resultStr + "...";
            }
            else
            {
                return source;
            }
        }

        /// <summary>
        /// 截取字符串
        /// </summary>
        /// <param name="source"></param>
        /// <param name="length"></param>
        /// <returns></returns>
        public static string StringCut(string source, int length)
        {
            source = source.Trim();
            string resultStr = "";
            byte[] myByte = System.Text.Encoding.Default.GetBytes(source);
            if (myByte.Length > length)
            {
                for (int i = 0; i < source.Length; i++)
                {
                    byte[] tempByte = System.Text.Encoding.Default.GetBytes(resultStr);
                    if (tempByte.Length < length)
                    {
                        resultStr += source.Substring(i, 1);
                    }
                    else
                    {
                        break;
                    }
                }
                return resultStr;
            }
            else
            {
                return source;
            }
        }

        #endregion

        #region 验证IP

        /// <summary>
        /// 验证IP
        /// </summary>
        /// <param name="source">待验证的字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsIP(string source)
        {
            return Regex.IsMatch(source, @"^(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9])\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[1-9]|0)\.(25[0-5]|2[0-4][0-9]|[0-1]{1}[0-9]{2}|[1-9]{1}[0-9]{1}|[0-9])$", RegexOptions.IgnoreCase);
        }

        #endregion

        #region 验证是不是正常字符 字母，数字，下划线的组合

        /// <summary>
        /// 验证是不是正常字符 字母，数字，下划线的组合
        /// </summary>
        /// <param name="source">待验证的字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsNormalChar(string source)
        {
            return Regex.IsMatch(source, @"[\w\d_]+", RegexOptions.IgnoreCase);
        }

        #endregion

        #region 验证是否是中文

        /// <summary>
        /// 验证是否是中文
        /// </summary>
        /// <param name="source">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsChinese(string source)
        {
            return Regex.IsMatch(source, @"^[\u4e00-\u9fa5]+$", RegexOptions.IgnoreCase);
        }

        #endregion

        #region 验证邮政编码 6个数字

        /// <summary>
        /// 验证邮政编码 6个数字
        /// </summary>
        /// <param name="source">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsPostCode(string source)
        {
            return Regex.IsMatch(source, @"^\d{6}$", RegexOptions.IgnoreCase);
        }

        #endregion

        #region 验证Int类型

        /// <summary>
        /// 验证Int类型
        /// </summary>
        /// <param name="source">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsInt(string source)
        {
            Regex regex = new Regex(@"^(-){0,1}\d+$");
            if (regex.Match(source).Success)
            {
                if ((long.Parse(source) > 0x7fffffffL) || (long.Parse(source) < -2147483648L))
                    return false;
                return true;
            }
            return false;
        }

        #endregion

        #region 验证是不是中国电话，格式010-85849685

        /// <summary>
        /// 验证是不是中国电话，格式010-85849685
        /// </summary>
        /// <param name="source">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsTel(string source)
        {
            return Regex.IsMatch(source, @"^\d{3,4}-?\d{6,8}$", RegexOptions.IgnoreCase);
        }

        #endregion

        #region 验证身份证是否有效

        /// <summary>
        /// 验证身份证是否有效
        /// </summary>
        /// <param name="Id">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsIDCard(string Id)
        {
            if (Id.Length == 18)
            {
                bool check = IsIDCard18(Id);
                return check;
            }
            else if (Id.Length == 15)
            {
                bool check = IsIDCard15(Id);
                return check;
            }
            else
                return false;
        }

        /// <summary>
        /// 身份证18位
        /// </summary>
        /// <param name="Id">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsIDCard18(string Id)
        {
            long n = 0;
            if (long.TryParse(Id.Remove(17), out n) == false || n < Math.Pow(10, 16) || long.TryParse(Id.Replace('x', '0').Replace('X', '0'), out n) == false)
                return false;//数字验证
            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2)) == -1)
                return false;//省份验证
            string birth = Id.Substring(6, 8).Insert(6, "-").Insert(4, "-");
            DateTime time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
                return false;//生日验证
            string[] arrVarifyCode = ("1,0,x,9,8,7,6,5,4,3,2").Split(',');
            string[] Wi = ("7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2").Split(',');
            char[] Ai = Id.Remove(17).ToCharArray();
            int sum = 0;
            for (int i = 0; i < 17; i++)
                sum += int.Parse(Wi[i]) * int.Parse(Ai[i].ToString());
            int y = -1;
            Math.DivRem(sum, 11, out y);
            if (arrVarifyCode[y] != Id.Substring(17, 1).ToLower())
                return false;//校验码验证
            return true;//符合GB11643-1999标准
        }

        /// <summary>
        /// 身份证15位
        /// </summary>
        /// <param name="Id">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsIDCard15(string Id)
        {
            long n = 0;
            if (long.TryParse(Id, out n) == false || n < Math.Pow(10, 14))
                return false;//数字验证
            string address = "11x22x35x44x53x12x23x36x45x54x13x31x37x46x61x14x32x41x50x62x15x33x42x51x63x21x34x43x52x64x65x71x81x82x91";
            if (address.IndexOf(Id.Remove(2)) == -1)
                return false;//省份验证
            string birth = Id.Substring(6, 6).Insert(4, "-").Insert(2, "-");
            DateTime time = new DateTime();
            if (DateTime.TryParse(birth, out time) == false)
                return false;//生日验证
            return true;//符合15位身份证标准
        }

        #endregion

        #region 验证邮箱

        /// 验证邮箱
        /// </summary>
        /// <param name="source">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsEmail(string source)
        {
            return Regex.IsMatch(source, @"^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$", RegexOptions.IgnoreCase);
        }

        #endregion

        #region 验证网址

        /// <summary>
        /// 验证网址
        /// </summary>
        /// <param name="source">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsUrl(string source)
        {
            return Regex.IsMatch(source, @"^(((file|gopher|news|nntp|telnet|http|ftp|https|ftps|sftp)://)|(www\.))+(([a-zA-Z0-9\._-]+\.[a-zA-Z]{2,6})|([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}))(/[a-zA-Z0-9\&amp;%_\./-~-]*)?$", RegexOptions.IgnoreCase);
        }

        #endregion

        #region 验证日期

        /// <summary>
        /// 验证日期
        /// </summary>
        /// <param name="source">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsDateTime(string source)
        {
            try
            {
                DateTime time = Convert.ToDateTime(source);
                return true;
            }
            catch
            {
                return false;
            }
        }

        #endregion

        #region 验证手机号

        /// <summary>
        /// 验证手机号
        /// </summary>
        /// <param name="source">待验证字符串</param>
        /// <returns>返回bool类型</returns>
        public static bool IsMobile(string source)
        {
            return Regex.IsMatch(source, @"^1[35]\d{9}$", RegexOptions.IgnoreCase);
        }

        #endregion

        #region 截取文章指定字符以#cutPage#分割
        /// <summary>
        /// 截取文章指定字符以#CutPage#分割
        /// </summary>
        /// <param name="source">待截取字符串</param>
        /// <returns>截取后的字符串</returns>
        public static string CutPage(string source)
        {
            if (source.IndexOf("#CutPage#") >= 0)
                return source.Substring(0, source.IndexOf("#CutPage#"));
            else
                return source;
        }
        #endregion
    }
}
